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| 漓江桂林市区段沉积物重金属环境地球化学特征 |
| Environmental Geochemistry of Heavy Metals in Sediments of Lijiang River Segment,Guilin City,China |
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| DOI： |
| 中文关键词: 漓江;沉积物;生态风险;重金属;来源; |
| 英文关键词: Lijiang River;sediment;potential ecological risk;heavy metal;origin; |
| 基金项目:国家自然基金(41073104),国家863计划(2009AA06A416); 广西北部湾经济区基础研究重大专项(2010GXNSFE013006); 广西青年科学基金(桂青科[02228098]) |
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| 中文摘要: |
| 以漓江桂林市区段表层沉积物为研究对象,测定了表层沉积物中Cd、As、Cu、Zn、Pb、Cr、Ni、Fe、Mn等14种元素的含量,采用潜在生态风险指数(RI)、相关分析和聚类分析等方法,研究了沉积物中重金属的污染水平、富集规律和可能来源。结果表明Cd污染最为严重,其它元素为轻微生态污染,污染程度为:Cd>As>Cu>Pb>Ni>Zn>Cr。因子分析的结果反映了Cr、Pb、Ni、Fe以自然来源为主,Mn、Co、As来自工业活动的污染,Cu、Zn、Cd则以自交通和农业面源为主。 |
| 英文摘要: |
| The concentrations of Cd,As,Cu,Zn,Pb,Cr,Ni,Fe and Mn were analyzed in surface sediment samples from the Lijiang River,Guilin City.By using a potential ecological risk index,correlation analysis and cluster analysis,the pollution and accumulation of heavy metals in surface sediments were studied.The results showed that Cd is one of the major pollutants,other elements are minor ones.The pollutants affected by potential ecological risk coefficient are,in decreasing order,Cd,As,Cu,Pb,Ni,Zn and Cr.A factor analy... |
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